EP 0010771 B1 19830216 - CAPACITANCE HUMIDITY SENSING ELEMENT
Title (en)
CAPACITANCE HUMIDITY SENSING ELEMENT
Publication
Application
Priority
DE 2848034 A 19781106
Abstract (en)
[origin: US4305112A] A multi-layered capacitive humidity sensing element having a carrier material separated from a water vapor permeable, electrically conductive coating by an insulating layer which is humidity sensitive, and a method for its manufacture is provided. A metal foil is utilized as the carrier material serving both as a support frame and as an electrically conductive layer. A thin gold layer is applied to the insulating layer, which is formed out of a synthetic material. The gold layer is sufficiently permeable to allow water vapor to freely diffuse into the synthetic layer from the surrounding atmosphere, yet remains thick enough to function as an electrically conductive outer layer. The sensing element thus constructed has both a short response time and an improved simplicity of manufacture.
IPC 1-7
IPC 8 full level
G01N 27/22 (2006.01)
CPC (source: EP US)
G01N 27/225 (2013.01 - EP US)
Citation (examination)
- DE 2702487 A1 19770728 - COMMISSARIAT ENERGIE ATOMIQUE
- DE 1573217 A1 19700813 - JOHNSON SERVICE CO
Designated contracting state (EPC)
FR GB IT SE
DOCDB simple family (publication)
EP 0010771 A1 19800514; EP 0010771 B1 19830216; DE 2848034 A1 19800514; JP S5566749 A 19800520; US 4305112 A 19811208
DOCDB simple family (application)
EP 79104286 A 19791102; DE 2848034 A 19781106; JP 14316479 A 19791105; US 9005179 A 19791031